Five-Dimensional Cosmological Scaling Solution

Abstract

A five-dimensional Ricci-flat cosmological solution is studied by assuming that the induced 4D matter contains two components: the usual fluid for dark matter as well as baryons and a scalar field with an exponential potential for dark energy. With use of the phase-plane analysis it is shown that there exist two late-time attractors one of which corresponds to a universe dominated by the scalar field alone and the other is a scaling solution in which the energy density of the scalar field remains proportional to that of the dark matter. It is furthermore shown that for this 5D scaling solution the universe expands with the same rate as in the 4D FRW models and not relies on which 4D hypersurface the universe is located in the 5D manifold.

arXiv comment6 pages,no figures, ws-mpla.cls style, published version

References in corpus (4)

• Exponential potentials and cosmological scaling solutions
• Kaluza-Klein Gravity
• Measuring and Understanding the Universe
• Universe Models with a Variable Cosmological "Constant" and a "Big Bounce"

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